Apparatus for making liquid zinc from blue powder



April 1929- F.'THARALDSEN 1,708,403

APPARATUS FOR MAKING LIQUID ZINC FROM BLUE POWDER Filed Nov. 21, 1923 INl EN TOR.

, powder into the zinc Patented Apr, 9, 1929. v

UNITED-STATES PATENT OFFICE.

FILIP THARALIDSEN, F OSLO, NORWAY.

APPARATUS FOR MAKING LIQUID ZINC FROM BLUE POWDER.

Original application filed November 21, 1923, Serial No. 676,079,'Divided and this application filed July 12, 1927.

My present invention relates to an apparatus for making liquid zinc fromblue powder according to the process described and claimed in myapplication for patent Serial No. 676,079, filedNovember 21, 1923,Patent No. 1,647,381, dated November 1, 1927, of which the presentapplication is a division. According to said process the blue powder isthe powder and poured over the latter. Just the same effect of intimate.contact is obtained by immersing the blue powder into the liquid zinc.

The apparatus I use for carrying out this process consists of arotatable drum, into which the powder is conveyed and in which ject tomodifications as for instance have a perforated bottom. Or theprojections mag be so located that between the projections and theadjacent Wall of the drum, pockets are formed that have one or moreapertures, foiyinstance a longitudinal slot, at their base.

In this case the liquid metal, that is lifted above the layer of powderin the drum will run back through these apertures upon the mass ofpowder below,

- It is understood that the shape and arrangement of the drum may bemodified in several respects. So it may have circular or polygonalsection, it may be of cylindrical form or cone-shaped, it may be mountedhorizontally or in inclined position and so on, such modifications beingwithin the scope of my invention. I

The arrangement above describedis illustrated in the accompanyingdrawing which is a transverse vertical section of an apparatus forcarrying out my invention.

The apparatus comprises a drum a/- rotatably mounted on rollers 'b--.-c-- placed upon a bath of liquid zinc and lo portions of the liquidzinc are raised above 7 of -the drum,

and in Norway November 28, 1922.

Serial No. 205,249.

is the lining of the drum and d the inside projections. e is the bath ofliquid zinc and f the mass ofpowder resting on the surface of the bath.The arrow indicates the direction of rotation. The drum may be operatedintermittently, so that certain quantities of powder and liquid metalare supplied to the drum and this charge worked up, after which freshquantities of powder and liquid metal are supplied. The drum may howeveralso be operated continuously with continuous supply of powdcr andcontinuous discharge of the residues.

The pockets formed by projections d vare provided with longitudinalslots (Z- near the wall of the drumto permit, as stated above, theliquid which is lifted above the layer of powder to run back through theslots onto the powder being raised by the pockets and back to the powderand zinc in the bottom of the drum.

Each projection forms an angle with a radial line extending from theaxis of the drum to the point where the projection joins the periphery.By this relative position of the projection to the periphery the powderis carried by the projection to the top of the drum before it isdischarged by gravity to the bottom of the latter.

The drum may work independently of the condenser from which the powderis taken.

vIn many cases it is however very convenient to convey the powder to thedrum immediately from the condenser, preferably without exposing powderand zinc to the air in order to avoid oxidation.

I claim:

An apparatus for makingliquid zinc from blue powder comprising a rotarydrum, a plurality of projections constituting pockets extending inwardlyfrom the inner periphery whereby portions of the contents of the drumare raised above the charge on the bottom of the drum before beingdischarged from the projections during the rotation of the drum, saidprojections having apertures adjacent their inner edges to permit thepassage of the liquid zinc during the upward movement of saidprojections.

In testimony that I claim the foregoing as my invention 1' have signedmy name.

FILIP THARALDSEN.

